BUTTERFLY FREE CHACK glue is completely free from organic solvents and is made from 100% liquidized natural caoutchouc. After a drying period of around 15 – 20 minutes it allows you to stick the rubber down onto the blade. This glue comes in a 90ml bottle with yellow sponges for spreading the glue. It is also very easy to remove the rubber from the blade and to peel off the remaining caoutchouc from the sponge. Note: Please shake bottle before use.